If your computer is running on Windows 7, Windows 8, or Windows 8.1, you are eligible for a free downloadable upgrade!

Click the image above to learn more. You must upgrade by

July 29, 2016 in order to get the free upgrade.

Adding clarity on the free upgrade from the Q&A Section:

Is the upgrade really free?

Yes, it's free. This is a full version of Windows, not a trial or introductory version. It is available for a limited time: you have until July 29th 2016 to take advantage of this offer. Once you upgrade, you'll have Windows 10 for free on that device.